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A regression analysis was carried out of returns on stocks (Y) versus the ratio of book to market value (X). The resulting prediction equation is
Y = 1.21 + 3.1X(2.89)
where the number in parentheses is the standard error of the slope estimate. The sample size used is n = 18. Is there evidence of a linear relationship between returns and book to market value?
data were collected on gpa and number of faceook friends for students in a small statistics class. some summary
Suppose that y is a random variable having a normal distribution with a mean equal to 250 and standard deviation equal to 10.
Discuss ratio, interval, nominal and ordinal variables. Explain what is meant by a margin of error for a confidence interval.
You are told that 95% of the scores range between 300 and 660. Using the 68, 95,99.7 rule, what is the standard deviation of exam scores?
the mean income per person in the united states is 40500 and the distribution of incomes follows a normal distribution.
Each of these systems functions, independently of the others, with probability 0.98. As long as at least one of these systems is functioning, this shuttle Component functions successfully.
What is the probability that the male sample will have at most three more days of absences than the female sample?
Find the probability that a value randomly selected from this population will have a value between 90 and 130.
Assuming that numbers of crimes in 4-weekly periods are independent, what is the probability that there will be at least 17 in the last three of the next six 4-week periods? explain your answer
Reconsider Prob. 17.6-9. The total compensation for the new employee would be $8 per hour, which is just half that for the cashier. It is estimated that the grocery store incurs lost profit due to lost future business of $0.08 for each minute that..
a random sample of n 400 measurements is drawn from a binomial population with probability of success .21. give the
the following data represents the time it takes a company to respond to an account inquiry for opening a new account.a.
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